Gearbox and transmission system

Abstract

This application provides a gearbox and transmission system. The gearbox includes: a housing defining a reduction chamber, a partition dividing the reduction chamber into a first lubrication zone and a second lubrication zone, both containing lubricating oil; a transmission component including at least two transmission gears and at least two transmission shafts, the transmission gears being fixedly mounted on the transmission shafts, the meshing area of ​​the transmission gears located in the first lubrication zone and immersed in the lubricating oil therein, the transmission shafts being rotatably mounted in the reduction chamber via bearings located in the second lubrication zone and immersed in the lubricating oil therein; and an oil-drip structure positioned above the first lubrication zone for dripping lubricating oil onto the meshing area. The gearbox of this application, through its partitioned lubrication zone design, effectively reduces mechanical impact and fluid noise during gear transmission.

Description

Technical Field

[0001] This application relates to transmission equipment technology, and more particularly to a gearbox and transmission system. Background Technology

[0002] As a core transmission device widely used in industrial equipment, transportation vehicles, automation systems and other fields, the speed reducer is mainly used to convert high-speed, low-torque input power into low-speed, high-torque output to meet the power transmission requirements under different working conditions.

[0003] However, in the operation of traditional reducers, the internal gears and bearings are lubricated by splashing, which results in loud noise and significant vibration, seriously affecting the stability, service life and comfort of the working environment. Utility Model Content

[0004] This application provides a gearbox and transmission system. By partitioning the lubrication area inside the gearbox, mechanical impact and fluid noise during gear transmission are effectively reduced, thereby significantly reducing overall operating noise and vibration and improving the stability and comfort of equipment operation.

[0005] On one hand, this application provides a gearbox, comprising: a housing, wherein a reduction chamber is defined within the housing, a partition is disposed within the reduction chamber, and the partition divides the reduction chamber into a first lubrication area and a second lubrication area, wherein lubricating oil is disposed in the first lubrication area and the second lubrication area; a transmission component, comprising at least two transmission gears and at least two transmission shafts, wherein the transmission gears are fixedly mounted on the transmission shafts, the meshing area of ​​the transmission gears is located in the first lubrication area, the transmission gears are immersed in the lubricating oil in the first lubrication area, the transmission shafts are rotatably mounted in the reduction chamber via bearings, the bearings are located in the second lubrication area, and the bearings are immersed in the lubricating oil in the second lubrication area; and an oil dripping structure disposed above the first lubrication area, the oil dripping structure being used to drip lubricating oil onto the meshing area.

[0006] This utility model's gearbox divides the reduction chamber into a first lubrication zone and a second lubrication zone by setting a partition. The meshing area of ​​the transmission gears is located in the first lubrication zone, allowing the gears to be immersed in lubricating oil, achieving smooth lubrication and reducing meshing impact. Simultaneously, the bearings are located in an independent second lubrication zone, avoiding the additional resistance and bubble noise caused by oil turbulence in traditional splash lubrication. This zoned lubrication design effectively reduces mechanical impact and fluid noise during gear transmission, thereby significantly reducing overall operating noise and vibration, and improving the stability and comfort of equipment operation.

[0007] In some embodiments, the immersion depth of the transmission gear in the first lubrication zone is 1-2 teeth.

[0008] Thus, when the immersion depth is shallow, the amount of oil carried up during gear rotation is moderate. Combined with the precise oil replenishment to the meshing area by the dripping structure, lubrication needs can be effectively met, while significantly reducing oil splashing, spraying, and foaming caused by violent agitation. This not only improves the oil circulation inside the housing but also reduces the additional noise generated by oil impacting the housing walls and components, further enhancing the quiet operation performance.

[0009] In some embodiments, the oil dripping structure includes a dispersing plate located above the meshing area, a receiving cavity formed within the dispersing plate, and an oil dripping pipe connected to the receiving cavity for delivering lubricating oil into the receiving cavity; an oil dripping port is provided on the side surface of the dispersing plate facing the meshing area, and the oil dripping port communicates with the receiving cavity.

[0010] The cavity formed by the dispersion plate has a certain oil storage capacity, which can play a role in stabilizing and buffering when the oil dripping pipe provides intermittent oil supply or when there are instantaneous flow fluctuations. This ensures that the oil can be continuously and stably supplied to the meshing area under conditions such as high-speed operation of gears or sudden load changes, avoiding oil film rupture and enhancing the dynamic response capability and reliability of the lubrication system.

[0011] According to some embodiments of the present invention, the dispersing plate extends axially along the drive shaft, and multiple oil drip ports are provided, with the multiple oil drip ports arranged at intervals along the axial direction of the drive shaft.

[0012] Since gear meshing does not only occur in the middle area, stress often concentrates at the tooth ends or in local areas due to shaft deformation, installation errors, or uneven loads in actual working conditions. Multiple oil drip ports are arranged at intervals along the axial direction of the transmission shaft to ensure a continuous and balanced supply of lubricating oil throughout the entire meshing width from one end of the gear to the other. This effectively prevents early pitting, scuffing, or uneven wear caused by insufficient lubrication in the edge areas, thereby improving transmission smoothness and load-bearing capacity.

[0013] According to some embodiments of the present invention, the partition is provided with a flow guide port, the flow guide port connects the first lubrication area and the second lubrication area, and a one-way flow guide device is provided in the flow guide port, the one-way flow guide device is used to make the lubricating oil in the first lubrication area flow unidirectionally towards the second lubrication area.

[0014] The second lubrication zone primarily lubricates the bearings of the drive shaft. As high-speed, high-precision components, bearings require extremely high levels of continuous lubrication and cleanliness. Traditional closed-loop design may result in insufficient oil supply or prolonged static aging in the second lubrication zone. This solution utilizes a unidirectional flow structure to continuously and controllably allow the lubricating oil, activated by gear rotation and temperature rise in the first lubrication zone, to flow into the second lubrication zone. This provides a stable and fresh lubrication supply to the bearings, effectively preventing dry friction, fretting wear, and premature fatigue failure, significantly extending bearing life.

[0015] According to some embodiments of the present invention, the unidirectional flow guiding device includes an elastic member located inside the flow guiding port and capable of extending and retracting along the axial direction of the flow guiding port. A sealing member is provided at one end of the elastic member away from the flow guiding port, and the sealing member is located in the second lubrication zone.

[0016] The combination of the elastic element and the sealing element forms a mechanical check valve structure. When the oil pressure in the first lubrication zone increases (e.g., due to gear rotation disturbance, thermal expansion, or oil accumulation), the lubricating oil pressure overcomes the preload of the elastic element, pushing the sealing element to compress the elastic element, opening the flow channel, and allowing the lubricating oil to flow from the first lubrication zone to the second lubrication zone. When the pressure decreases or a reverse pressure difference occurs, the elastic element resets and pushes the sealing element to re-press the sealing surface, quickly cutting off the oil circuit and preventing the lubricating oil from flowing back.

[0017] According to some embodiments of the present invention, a filter element is provided at the end of the guide port facing the first lubrication area.

[0018] The first lubrication zone is the meshing area of ​​the transmission gears. During long-term operation, the gearbox is prone to generating contaminants such as metal wear particles, oil oxides, and dust impurities. By installing a filter element (such as a metal mesh filter element, sintered filter media, or a perforated plate) at the inlet end of the guide port (i.e., the side of the first lubrication zone), the lubricating oil can be initially purified before flowing to the unidirectional guide device, intercepting larger abrasive particles and impurities, preventing them from entering the guide port or migrating to the second lubrication zone with the oil flow, and avoiding contaminants entering the bearings and causing bearing damage.

[0019] In some embodiments, the enclosure includes an outer layer and an inner layer, with a gap defined between the outer layer and the inner layer, and a sound insulation element disposed within the gap.

[0020] The noise generated during gearbox operation is radiated to the outside air through the vibration of the gearbox wall. By setting up a double-layer gearbox structure with an outer and inner layer and filling the gap between the two with sound insulation materials, a sound insulation system is formed, which helps to improve the noise reduction effect of the gearbox.

[0021] In some embodiments, the housing is provided with ventilation holes, which allow the deceleration chamber to communicate with the outside.

[0022] During prolonged operation, the internal lubricating oil of the gearbox expands due to heat, causing the air temperature and pressure inside the reduction chamber to rise. Conversely, during shutdown and cooling, the gas inside the chamber contracts, creating negative pressure. If the gearbox is completely sealed, positive pressure may cause lubricating oil to leak from shaft seals, mating surfaces, etc., while negative pressure may draw in external dust and moisture, contaminating the lubricating oil. By incorporating ventilation holes, the reduction chamber can be connected to the outside atmosphere, allowing for real-time balancing of the internal and external pressure differences. This effectively prevents oil leaks or dust accumulation caused by abnormal pressure, significantly improving the reliability and service life of the gearbox.

[0023] Secondly, embodiments of this application also provide a transmission system, including the gearbox described above.

[0024] The transmission system of this utility model, by using the aforementioned gearbox and designing the lubrication area within the gearbox in a partitioned manner, effectively reduces mechanical impact and fluid noise during gear transmission. The gearbox is designed as a double-layer structure, and a sound insulation component is installed between the inner and outer layers to block noise transmission, which helps to reduce environmental noise. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0026] Figure 1 This is a schematic diagram of the gearbox structure according to an embodiment of the present utility model;

[0027] Figure 2 This is one of the schematic diagrams of the internal structure of the gearbox in an embodiment of the present utility model;

[0028] Figure 3 This is the second schematic diagram of the internal structure of the gearbox in an embodiment of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100-Gearbox;

[0031] 110 - Housing; 111 - Reduction chamber; 1111 - Partition; 1111a - Flow guide; 1112 - First lubrication zone; 1113 - Second lubrication zone; 112 - Ventilation hole;

[0032] 120 - Transmission component; 121 - Transmission gear; 122 - Transmission shaft; 123 - Bearing;

[0033] 130 - Oil dripping structure; 131 - Dispersion plate; 132 - Oil dripping tube.

[0034] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0035] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0036] As a core transmission device widely used in industrial equipment, transportation vehicles, automation systems and other fields, the speed reducer is mainly used to convert high-speed, low-torque input power into low-speed, high-torque output to meet the power transmission requirements under different working conditions.

[0037] However, in the operation of traditional reducers, the internal gears and bearings are lubricated by splashing, which results in loud noise and significant vibration, seriously affecting the stability, service life and comfort of the working environment.

[0038] In view of this, this application provides a gearbox and transmission system that effectively reduces mechanical impact and fluid noise during gear transmission by partitioning the lubrication area inside the gearbox, thereby significantly reducing overall operating noise and vibration and improving the stability and comfort of equipment operation.

[0039] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0040] refer to Figures 1 to 3 On the one hand, this application provides a gearbox 100, which includes a housing 110, a transmission component 120, and an oil dripping structure 130.

[0041] The gearbox 110 defines a reduction chamber 111, which serves as a space for power transmission and lubrication management, ensuring the sealing and structural strength of the gearbox 100 during operation. A partition 1111 is installed within the reduction chamber 111, dividing it into a first lubrication zone 1112 and a second lubrication zone 1113. Lubricating oil is contained in both zones. The first lubrication zone 1112 accommodates the transmission gear 121 and its meshing area, primarily for gear transmission lubrication and heat dissipation. The second lubrication zone 1113 accommodates the bearing 123 supporting the transmission shaft 122, specifically for the lubrication and protection of the bearing 123.

[0042] The transmission component 120 includes at least two transmission gears 121 and at least two transmission shafts 122. The transmission gears 121 are fixedly mounted on the transmission shafts 122. Adjacent transmission gears 121 mesh with each other. The meshing area of ​​the transmission gears 121 is located in the first lubrication area 1112. The transmission gears 121 are immersed in the lubricating oil in the first lubrication area 1112 to achieve boundary lubrication or elastic hydrodynamic lubrication of the transmission gears 121.

[0043] The drive shaft 122 is rotatably mounted in the reduction chamber 111 via the bearing 123. Exemplarily, a seat is provided on the inner wall of the reduction chamber 111, and the bearing 123 is mounted on the seat. Power is transmitted from the input shaft to the output shaft via gear meshing, completing the reduction and torque increase function. The bearing 123 is located in the second lubrication zone 1113 and is immersed in the lubricating oil of the second lubrication zone 1113, achieving zoned lubrication.

[0044] The oil dripping structure 130 is disposed above the first lubrication zone 1112 and is used to drip lubricating oil onto the meshing area. For example, the oil dripping structure 130 can be an external micro oil pump, oil cup, or capillary oil guide device. The oil dripping structure 130 faces the vicinity of the gear meshing line. During the operation of the gearbox 100, the oil dripping structure 130 continuously or periodically drips lubricating oil onto the meshing area to ensure sufficient lubrication at the meshing position of the transmission gear 121.

[0045] By setting an oil drip structure 130 above the first lubrication zone 1112, lubricating oil can be continuously and precisely replenished to the gear meshing area, ensuring sufficient and stable lubrication in high-load, high-friction areas and avoiding wear or galling caused by local oil film rupture. Compared with the traditional method that relies entirely on gear rotation to drive oil splashing, the oil drip structure 130 achieves on-demand oil supply, improving lubrication efficiency and extending gear service life.

[0046] The gearbox 100 of this invention divides the reduction chamber 111 into a first lubrication zone 1112 and a second lubrication zone 1113 by setting a partition 1111. The meshing area of ​​the transmission gear 121 is located in the first lubrication zone 1112, allowing the gear to be immersed in lubricating oil, achieving smooth lubrication and reducing meshing impact. At the same time, the bearing 123 is located in the independent second lubrication zone 1113, avoiding the additional resistance and bubble noise caused by oil turbulence in traditional splash lubrication. This partitioned lubrication design effectively reduces mechanical impact and fluid noise during gear transmission, thereby significantly reducing overall operating noise and vibration, and improving the stability and comfort of equipment operation.

[0047] In addition, by placing the gear and bearing 123 in different lubrication areas, the "oil churning loss" caused by the bearing 123 stirring up a large amount of lubricating oil during high-speed rotation is avoided, internal power loss is reduced, and transmission efficiency is improved. This is especially suitable for long-term continuous operation and has a good energy-saving effect.

[0048] In some embodiments, the immersion depth of the transmission gear 121 in the first lubrication zone 1112 is 1-2 teeth. Exemplarily, the immersion depth of the transmission gear 121 can be 1 tooth, 1.5 teeth, or 2 teeth. Of course, the immersion depth of the transmission gear 121 can also be other dimensions, which designers can choose according to their needs; this application does not limit this. Controlling the immersion depth of the transmission gear 121 within the range of 1-2 teeth ensures that the gear meshing initiation area receives a sufficient lubricating oil film to form effective lubrication, preventing wear caused by dry friction or boundary lubrication, while also avoiding excessive immersion of the gear in the lubricating oil, which would generate significant oil churning resistance.

[0049] Thus, when the immersion depth is shallow, the amount of oil carried up during gear rotation is moderate. Combined with the precise oil replenishment of the meshing area by the oil drip structure 130, lubrication needs can be effectively met, while significantly reducing oil splashing, spraying, and foaming caused by violent agitation. This not only improves the oil circulation state inside the housing 110, but also reduces the additional noise generated by oil impacting the housing walls and components, further enhancing the quiet operation performance.

[0050] In addition, the immersion depth of the transmission gear 121 is 1-2 teeth, which allows the lubricating oil to mainly act on the inlet area of ​​gear meshing. This is conducive to the formation of a stable hydrodynamic oil film between the tooth surfaces. At the same time, the oil dripping structure 130 above continuously supplies oil from the top of the meshing area, realizing a synergistic lubrication mode of "bottom immersion + top oil replenishment". This helps to distribute heat evenly along the meshing path, avoid local overheating, improve thermal management capabilities, and enhance the controllability and stability of the lubrication process.

[0051] refer to Figure 2In some embodiments, the oil dripping structure includes a dispersing plate 131 located above the meshing area. A receiving cavity is formed inside the dispersing plate 131, and an oil dripping pipe 132 is connected to the receiving cavity to deliver lubricating oil into the receiving cavity. The receiving cavity inside the dispersing plate 131 serves as a temporary oil storage and distribution space for lubricating oil, which can guide the lubricating oil delivered by the oil dripping pipe 132 laterally and buffer and equalize the pressure, thus preventing the lubricating oil from dripping from a single point.

[0052] The dispersion plate 131 has an oil drip port on one side of its surface facing the meshing area, and the oil drip port is connected to the receiving cavity.

[0053] The cavity formed by the dispersion plate 131 has a certain oil storage capacity, which can play a role in stabilizing and buffering when the oil dripping pipe 132 intermittently supplies oil or when there are instantaneous flow fluctuations. This ensures that the oil can be continuously and stably supplied to the meshing area under conditions such as high-speed operation of gears or sudden load changes, thus avoiding oil film rupture and enhancing the dynamic response capability and reliability of the lubrication system.

[0054] Lubricating oil drips into the meshing area through the oil drip nozzle on the dispersion plate 131 with a controllable flow rate and direction. Compared with the problem of oil droplet size and random trajectory in traditional splash lubrication, this structure can effectively control the oil droplet size and landing position, so that it can act precisely on the tooth surface meshing / meshing area, maximize lubrication efficiency, and at the same time reduce ineffective splashing and oil mist generation caused by excessive oil droplet impact or position deviation, further reducing internal disturbance and noise.

[0055] In some possible embodiments, the drip line 132 may be connected to an oil pump for supplying oil to the dispersion plate 131.

[0056] According to some embodiments of this utility model, the dispersion plate 131 extends axially along the transmission shaft 122, and multiple oil drip ports are provided, which are arranged at intervals along the axial direction of the transmission shaft 122. Since gear meshing does not only occur in the middle region, in actual working conditions, stress concentration often occurs at the tooth ends or local areas due to shaft deformation, installation errors, or uneven loads. The multiple oil drip ports arranged at intervals along the axial direction of the transmission shaft 122 can ensure a continuous and balanced supply of lubricating oil throughout the entire meshing width from one end of the gear to the other, effectively preventing early pitting, galling, or uneven wear caused by insufficient lubrication in the edge areas, and improving transmission smoothness and load-bearing capacity.

[0057] Understandably, for reducers with large tooth widths or those using helical gears, herringbone gears, or other long contact line transmission methods, traditional single-point or localized oil supply is difficult to cover the entire meshing surface. In this embodiment, the axially extended dispersion plate 131 and the multi-point oil drip port layout can flexibly match gears with different tooth width specifications, making it particularly suitable for heavy-duty, high-precision, or large transmission equipment, significantly enhancing the versatility and engineering adaptability of the gearbox 100 structure.

[0058] Furthermore, the multiple axially spaced oil drip ports form a redundant oil supply path. Even if the efficiency of individual drip ports decreases due to blockage by impurities or slight misalignment, the remaining drip ports can still maintain overall lubrication function, avoiding the risk of localized oil shortage. At the same time, this layout has a strong tolerance for minor axial movement of gears or assembly deviations, ensuring the stable operation of the lubrication system under complex working conditions.

[0059] Continue to refer to Figure 2 According to some embodiments of the present invention, a flow guide port 1111a is provided on the partition 1111, the flow guide port 1111a connects the first lubrication zone 1112 and the second lubrication zone 1113, and a one-way flow guide device is provided in the flow guide port 1111a, the one-way flow guide device is used to make the lubricating oil in the first lubrication zone 1112 flow unidirectionally towards the second lubrication zone 1113.

[0060] When the transmission gear 121 rotates and agitates in the first lubrication zone 1112, oil splashing and pressure fluctuations occur. Some lubricating oil may enter the space above the meshing area with the movement of the transmission gear 121 or the airflow within the cavity. By providing a guide port 1111a with a one-way flow guide device, excess lubricating oil accumulated in the first lubrication zone 1112 due to agitation, condensation, or backflow can be orderly guided into the second lubrication zone 1113, preventing abnormal rise in the oil level in the first lubrication zone 1112 from causing excessive oil immersion in the gears or aggravated oil mist. At the same time, this design achieves dynamic redistribution of oil volume between the two lubrication zones, improving the overall utilization efficiency of the lubricating oil.

[0061] The second lubrication zone 1113 primarily lubricates the bearing 123 of the drive shaft 122. As a high-speed, high-precision component, the bearing 123 requires extremely high levels of continuous lubrication and cleanliness. Traditional closed-loop designs may result in insufficient oil supply or prolonged static aging in the second lubrication zone 1113. This solution utilizes a unidirectional flow structure to ensure that the lubricating oil, activated by gear rotation and temperature rise in the first lubrication zone 1112, continuously and controllably flows into the second lubrication zone 1113, providing a stable and fresh lubrication supply to the bearing 123. This effectively prevents dry friction, fretting wear, and premature fatigue failure, significantly extending the service life of the bearing 123.

[0062] Furthermore, during the operation of the gearbox 100, temperature changes and gas disturbances can easily create pressure differences within the enclosed cavity, potentially leading to seal leakage or unstable oil supply from the dripping structure 130. The presence of the guide port 1111a can, to some extent, balance the pressure between the first lubrication zone 1112 and the second lubrication zone 1113, while the unidirectional flow design, while achieving pressure balance, avoids turbulent flow of oil caused by backflow due to pressure difference, improving the fluid stability of the entire lubrication system and helping to reduce leakage failures.

[0063] In some possible embodiments, the unidirectional flow guide device may include a one-way valve (such as a duckbill valve, ball valve, butterfly valve, etc.) or a labyrinth check structure.

[0064] According to some embodiments of the present invention, the unidirectional flow guide device includes an elastic member located inside the flow guide port 1111a and capable of stretching and contracting along the axial direction of the flow guide port 1111a. A sealing member is provided at one end of the elastic member away from the flow guide port 1111a, and the sealing member is located in the second lubrication zone 1113.

[0065] The cooperation between the elastic element and the sealing element constitutes a mechanical check valve structure. When the oil pressure in the first lubrication zone 1112 increases (such as due to gear rotation disturbance, thermal expansion, or oil accumulation), the lubricating oil pressure overcomes the preload of the elastic element, pushing the sealing element to compress the elastic element, opening the flow channel, and allowing the lubricating oil to flow from the first lubrication zone 1112 to the second lubrication zone 1113; when the pressure decreases or a reverse pressure difference occurs, the elastic element resets and pushes the sealing element to re-press the sealing surface, quickly cutting off the oil circuit and preventing the lubricating oil from flowing back.

[0066] Optionally, the elastic element can be a spring.

[0067] According to some embodiments of the present invention, a filter element is provided at one end of the guide port 1111a facing the first lubrication zone 1112.

[0068] The first lubrication zone 1112 is the meshing area of ​​the transmission gear 121. During long-term operation, the gearbox 100 is prone to generating contaminants such as metal wear particles, oil oxides, and dust impurities. By installing a filter element (such as a metal mesh filter element, sintered filter media, or a perforated plate) at the inlet end of the guide port 1111a (i.e., the side of the first lubrication zone 1112), the lubricating oil can be initially purified before flowing to the unidirectional guide device, intercepting larger abrasive particles and impurities, preventing them from entering the interior of the guide port 1111a or migrating to the second lubrication zone 1113 with the oil flow, and avoiding contaminants entering the bearing 123 and causing damage to the bearing 123.

[0069] In some embodiments, the enclosure 110 includes an outer layer and an inner layer, with a gap defined between the outer layer and the inner layer, and a sound insulation element disposed within the gap.

[0070] The noise generated during the operation of the gearbox 100 is radiated to the outside air through the vibration of the housing 110 wall. By setting up a double-layer housing 110 structure with an outer and inner layer and filling the gap between the two with sound insulation materials, a sound insulation system is formed, which helps to improve the noise reduction effect of the gearbox 100.

[0071] In some possible embodiments, the sound insulation element may include sound-absorbing foam, porous sound-absorbing material, damping layer or composite sound insulation felt.

[0072] In some embodiments, the housing 110 is provided with a ventilation hole 112, which allows the deceleration chamber 111 to communicate with the outside.

[0073] During prolonged operation, the internal lubricating oil of gearbox 100 expands due to heat, and the air temperature and pressure inside reduction chamber 111 increase. Conversely, during shutdown and cooling, the gas inside the chamber contracts, creating negative pressure. If gearbox 110 is completely sealed, positive pressure may cause lubricating oil to leak from shaft seals, mating surfaces, etc., while negative pressure may draw in external dust and moisture, contaminating the lubricating oil. By providing ventilation holes 112, reduction chamber 111 can be connected to the outside atmosphere, balancing the internal and external pressure difference in real time. This effectively prevents oil leakage or dust accumulation caused by abnormal pressure, significantly improving the reliability and service life of gearbox 100.

[0074] In some possible embodiments, the ventilation hole 112 may be provided with a labyrinthine moisture-proof structure, or a breathable membrane may be provided at the end of the ventilation hole 112 that communicates with the outside, so as to limit the large amount of humid air entering while balancing the air pressure.

[0075] This helps to expel moisture from the cavity with the hot air, preventing water vapor from condensing into water droplets on the inner wall of the housing 110 due to excessive temperature difference during the shutdown cooling process, which could then mix with the lubricating oil and cause problems such as emulsification and corrosion, thus extending the lubricating oil replacement cycle.

[0076] Secondly, embodiments of this application also provide a transmission system, including the gearbox 100 described above.

[0077] The transmission system of this utility model, by using the aforementioned gearbox 100 and designing the lubrication area within the housing 110 in a partitioned manner, effectively reduces mechanical impact and fluid noise during gear transmission. The housing 110 is set as a double-layer structure, and a sound insulation component is installed between the inner and outer layers to block noise transmission, which helps to reduce environmental noise.

[0078] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0079] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A gear box (100) characterized by, include: A housing (110) defines a deceleration chamber (111) within the housing (110). A partition (1111) is provided inside the deceleration chamber (111), and the partition (1111) divides the deceleration chamber (111) into a first lubrication area (1112) and a second lubrication area (1113). Lubricating oil is provided in the first lubrication area (1112) and the second lubrication area (1113). The transmission component (120) includes at least two transmission gears (121) and at least two transmission shafts (122). The transmission gears (121) are fixedly mounted on the transmission shafts (122). The meshing area of ​​the transmission gears (121) is located in the first lubrication area (1112). The transmission gears (121) are immersed in the lubricating oil in the first lubrication area (1112). The transmission shafts (122) are rotatably mounted in the reduction chamber (111) via bearings (123). The bearings (123) are located in the second lubrication area (1113). The bearings (123) are immersed in the lubricating oil in the second lubrication area (1113). An oil-drip structure (130) is disposed above the first lubrication area (1112), and the oil-drip structure (130) is used to drip lubricating oil onto the meshing area.

2. The gearbox (100) according to claim 1, characterized in that, The immersion depth of the transmission gear (121) in the first lubrication zone (1112) is 1-2 teeth.

3. The gearbox (100) according to claim 1, characterized in that, The oil dripping structure (130) includes a dispersing plate (131) located above the meshing area. A receiving cavity is formed inside the dispersing plate (131), and an oil dripping pipe (132) is connected to the receiving cavity to deliver lubricating oil into the receiving cavity. The dispersion plate (131) has an oil drip port on one side surface facing the meshing area, and the oil drip port is connected to the receiving cavity.

4. The gearbox (100) according to claim 3, characterized in that, The dispersion plate (131) extends along the axial direction of the drive shaft (122), and the oil dripping port is provided in multiple ways, with the multiple oil dripping ports arranged at intervals along the axial direction of the drive shaft (122).

5. The gearbox (100) according to claim 1, characterized in that, The partition (1111) is provided with a flow guide (1111a), which connects the first lubrication area (1112) and the second lubrication area (1113). A one-way flow guide device is provided in the flow guide (1111a), which is used to make the lubricating oil in the first lubrication area (1112) flow unidirectionally towards the second lubrication area (1113).

6. The gearbox (100) according to claim 5, characterized in that, The unidirectional flow guiding device includes an elastic element located inside the flow guiding port (1111a) and capable of axial extension and retraction along the flow guiding port (1111a). A sealing element is provided at one end of the elastic element away from the flow guiding port (1111a), and the sealing element is located in the second lubrication zone (1113).

7. The gearbox (100) according to claim 5, characterized in that, A filter element is provided at the end of the flow guide (1111a) facing the first lubrication area (1112).

8. The gearbox (100) according to any one of claims 1-7, characterized in that, The enclosure (110) includes an outer layer and an inner layer, with a gap defined between the outer layer and the inner layer, and a sound insulation component is provided in the gap.

9. The gearbox (100) according to any one of claims 1-7, characterized in that, The housing (110) is provided with a ventilation hole (112), which allows the deceleration chamber (111) to communicate with the outside.

10. A transmission system, characterized in that, include: The gearbox (100) according to any one of claims 1-9.

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